Motion Induction Haptic Feedback for Mobile Devices
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Solution Overview
Problem
Conventional vibration motors in mobile devices consume high current and have limited haptic bandwidth, making it difficult to provide distinct user feedback through vibrations.
Innovation Solution
A motion induction system using a magnetic element within a hollow tube, controlled by electrically conducting coils, generates dynamic force feedback by varying current flow to produce directional impulses, allowing for context-aware notifications without high power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If vibration motors are used to provide user feedback, then notification function is achieved, but current consumption is high
Solution Approach 1:
The patent applies dynamics by varying the vibration characteristics (frequency, amplitude, pattern) dynamically based on message context and user preferences. The system transitions from static vibration patterns to dynamic, context-aware vibration sequences, allowing differentiated feedback for different message types while using the same motor hardware.
Solution Approach 2:
The system changes multiple parameters of the vibration output including frequency, amplitude, duration, and temporal patterns. By modulating these parameters according to message importance and type, the system achieves high information transmission efficiency without requiring additional hardware, thereby reducing power consumption compared to using multiple vibration motors.
2Adaptability or versatility
If vibration motors are used to provide user feedback, then notification function is achieved, but haptic bandwidth is limited
Solution Approach 1:
The patent employs periodic vibration patterns with varying frequencies, durations, and intervals to encode different message types. By creating distinct temporal sequences (e.g., short bursts vs. continuous vibration, single tap vs. repeated patterns), the system expands the information capacity of a single vibration motor, achieving high haptic bandwidth through temporal coding.
3Loss of information
If directional force feedback is provided through motion induction, then message context is conveyed, but device complexity increases
Solution Approach 1:
The patent segments the vibration motor into functionally independent control dimensions (direction, intensity, frequency, pattern) that can be independently manipulated. This segmentation allows the system to convey multiple message attributes simultaneously through different vibration parameters, reducing the need for additional notification hardware while maintaining rich contextual information.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides effective, low-power dynamic force feedback that conveys message types, contents, and contexts to users through directional impulses, enhancing user interaction and extending battery life in mobile devices.
Implementation Method 1
A motion induction system using a magnetic element within a hollow tube, controlled by electrically conducting coils, generates dynamic force feedback by varying current flow
Data Source
AI summary
Dynamic force feedback is provided in a device to alert a user about a message received on the device from a remote user and to convey content, context, or a type of the message. Producing dynamic force feedback may include activating a motion induction device, which accelerates and decelerates a mass to create tapping within the device. The amplitude and frequency of the tapping may be configured to produce sequences of taps to alert the user about different types, contexts, or content of received messages. Additionally, multiple motion induction devices may be included in a device to produce dynamic force feedback along multiple dimensions. Multiple dimension dynamic force feedback may be used in providing geographical directions to a user.